Hypoglycaemia, an apparent cause of infertility of lactating cows.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases; D005260:Female; D007003:Hypoglycemia / Q000150:complications / Q000662:veterinary*; D007247:Infertility, Female / Q000209:etiology / Q000662:veterinary*; D007774:Lactation; D011247:Pregnancy